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SUI Bridging

Bridging is the process of moving tokens from one blockchain to another. When you use a bridge to move tokens between blockchains that are incompatible, the tokens are "wrapped" by the bridge, which means that they get converted to a derivative token for the target blockchain. You can transfer tokens in from other blockchains to SUI, or transfer SUI tokens out to other blockchains.

Sui supports bridging through Sui Bridge, Wormhole Connect, and Wormhole Portal Bridge.

Sui Bridge​

Sui Bridge is the native bridge for the Sui network. Sui Bridge is built into the core architecture of the Sui blockchain, which provides optimal integration and operation. Sui Bridge enables the movement of digital assets between the Sui block chain and others, preserving security and maintaining interoperability between diverse ecosystems. Sui Bridge provides secure and efficient transfer of native and wrapped ETH to and from Sui. Sui Bridge leverages the unique capabilities of the Sui network to offer fast transaction speeds, lower transaction costs, and a decentralized architecture.

You can bridge tokens in the official Sui Bridge website: https://bridge.sui.io/.

Operation and governance​

Sui Bridge is operated and governed by Sui network validators, the same set of validators that secure the Sui network. Bridge transfers and other actions require validator signatures with a minimal threshold of voting power.

Similar to the Sui network, all governance related to the Sui Bridge is done through validator voting.

To learn more about how to set up a Sui Bridge Full Node, see Sui Bridge Validator Node Configuration.

Supported chains and tokens​

You can transfer supported assets both to and from the Sui network. Sui Bridge supports token bridging between Sui and other networks with the following supported assets:

AssetDescription
Wrapped BitcoinTokenized representation of the native cryptocurrency of the Bitcoin network.
Lightning Bitcoin (LBTC)Fully decentralized Internet-of-value protocol for global payments.
Ethereum (ETH)The native cryptocurrency of the Ethereum network, widely used for transactions and smart contract interactions.
Wrapped Ethereum (WETH)Tokenized representation of native ETH.
Tether (USDT)A stablecoin pegged to the US dollar.

Package IDs and contract addresses​

The following package IDs and addresses are reserved for the Sui Bridge.

AssetAddress/ID
Sui Bridge package on Sui0xb
Sui Bridge object on Sui0x9
Sui Bridge contract on Etheruem Mainnet0xda3bD1fE1973470312db04551B65f401Bc8a92fD
ETH on Sui0xd0e89b2af5e4910726fbcd8b8dd37bb79b29e5f83f7491bca830e94f7f226d29::eth::ETH
ETH on EthereumNative Ether
WETH on Ethereum0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2

Source code​

The source code for Sui Bridge is open-source and found in the following locations:

Audits​

There are two audit reports available for Sui Bridge:

Global limiter​

A limiter protects the user's funds by constraining the total value of assets leaving Sui Bridge in any 24-hour window. It tracks total value hourly and aggregates values from the previous 24 hours. Therefore, when the limiter cools down, it refreshes every hour.

The limit applies globally and varies per direction. For example, the amount might be different between Ethereum to Sui and Sui to Ethereum.

The limit also impacts the maximal amount of single transfer. In one bridge transfer, you cannot move assets worth more than the limit. The bridge frontend might apply stricter restrictions to protect user assets.

The limit per route is governed by the validator committee through voting.

The global limit is currently 8millionfromEthereumtoSuiand8 million from Ethereum to Sui and 5 million from Sui to Etheruem every 24 hours.

Asset price​

Sui Bridge v1 uses static pricing to calculate limits. The price for ETH is configured at 2,600.00.Namely,bridgingoneETHconsumes2,600.00. Namely, bridging one ETH consumes 2,600 USD in limit calculation.

The validator committee governs the pricing through voting. It works together with the global limiter to protect user funds.

Transfer limit​

There is no minimal limit for transfer, but a tiny fraction might be rounded down. Particularly for native Ethereum (ETH) and wrapped Ethereum (WETH) because of reduced precision of eight decimal places, the value of 10.0000000000000001 (W)ETH is rounded down to 10 (W)ETH.

TokenMinimal value
ETH0.00000001 ETH (eight decimal places of precision)
WETH0.00000001 ETH (eight decimal places of precision)

The maximum limit per transfer is the global limit in USD value. Namely a user cannot claim assets on the destination chain if the USD value is higher than the global limit. See the Global limiter section for details.

Wormhole Connect​

Use Wormhole Connect to bridge tokens from any Wormhole supported chain into Sui and get dropped off with extra Sui to pay gas fees. Developers can also embed the Connect Token Bridge directly into their own websites and dApps.

tip

Wormhole provides a tutorial for cross-chain transfers of Sui using a Wormhole Connect integration. Visit Cross-Chain Token Transfers with Wormhole Connect on the Wormhole website to get started.

Wormhole Connect asset support​

Initially, Wormhole Connect supports only lock-and-mint bridging for ETH, WETH, USDC, MATIC, WMATIC, BNB, WBNB, AVAX, WAVAX, FTM, WFTM, CELO, GLMR, WGLRM, AND SOL across Ethereum, Polygon, BSC, Avalanche, Celo, Moonbeam, Solana and Sui. This means that any native token bridged through Wormhole Connect and the underlying Wormhole Token Bridge are received as a Wormhole-minted token on the destination chain. In some cases, Wormhole-minted tokens are the canonical representation on the chain. See the Wormhole token list on GitHub. Some Wormhole-minted tokens support swapping on the destination chain's DEX(s) for whichever assets you need.

Wormhole Connect automatic relay​

On EVM-based chains and Sui, Wormhole Connect lets you bridge assets while having to pay gas only on the source chain. The automatic relaying feature pays gas on behalf of users on the destination chain.

Wormhole Connect gas drop-off​

The gas drop-off feature enables users to pay an additional fee on the source chain to request a small amount of native gas on the destination chain. For example, a user bridging USDC from Ethereum to Sui can pay a fee denominated in USDC from their sending wallet to receive some native SUI in their receiving wallet. This is in addition to the USDC they are bridging over. Gas drop-off is currently supported on EVM-based chains and Sui.

To learn more about Wormhole Connect, see their FAQ page.

Wormhole Portal Bridge​

The Wormhole powered Portal Bridge supports bridging any asset from any of the 22 supported Wormhole chains.

Token address list​

The following table lists the address associated with each token type. You can confirm the legitimacy of tokens when you bridge them by confirming that the address used matches the address for the token type.

TokenAddress
CELO0xa198f3be41cda8c07b3bf3fee02263526e535d682499806979a111e88a5a8d0f
WMATIC0xdbe380b13a6d0f5cdedd58de8f04625263f113b3f9db32b3e1983f49e2841676
WBNB0xb848cce11ef3a8f62eccea6eb5b35a12c4c2b1ee1af7755d02d7bd6218e8226f
WETH0xaf8cd5edc19c4512f4259f0bee101a40d41ebed738ade5874359610ef8eeced5
USDC0x5d4b302506645c37ff133b98c4b50a5ae14841659738d6d733d59d0d217a93bf
USDT0xc060006111016b8a020ad5b33834984a437aaa7d3c74c18e09a95d48aceab08c
WBTC0x027792d9fed7f9844eb4839566001bb6f6cb4804f66aa2da6fe1ee242d896881
WAVAX0x1e8b532cca6569cab9f9b9ebc73f8c13885012ade714729aa3b450e0339ac766
WFTM0x6081300950a4f1e2081580e919c210436a1bed49080502834950d31ee55a2396
WGLMR0x66f87084e49c38f76502d17f87d17f943f183bb94117561eb573e075fdc5ff75
WSOL0xb7844e289a8410e50fb3ca48d69eb9cf29e27d223ef90353fe1bd8e27ff8f3f8
USDCsol0xb231fcda8bbddb31f2ef02e6161444aec64a514e2c89279584ac9806ce9cf037